This section presents the details of our experimental setup for axion-like dark matter searches.
Figure REF  shows the schematic of the experimental apparatus.
0.5 cm\(^3\)  volume cubic vapor cell made from pyrex glass contains 5 torr isotopically enriched \(^{129}\) Xe, 250 torr N\(_2\)  as buffer gas, and a droplet (several miligrams) of isotopically enriched \(^{87}\) Rb metal. The vapor cell is heated to 140 \(^\circ \) C with twisted wire using AC current.
The cell is magnetically shielded with a five-layer cylindrical \(\mu \) -metal shield (shielding factor of 10\(^6\) ). Two sets of three pairs orthogonal coils are placed around the vapor cell and can provide bias and oscillating magnetic fields in an arbitrary direction. A bias field \(B_{0}^{z}\)  (above 200 \(\rm {nT}\) ) is applied along \(z\)  with current driven with a precision current source (Krohn-Hite Model 523) and an oscillating field \(B_{\rm {ac}}^{y}\)  is applied along \(y\)  with an arbitrary waveform generator (Keysight Model 33210A). The \(^{87}\) Rb atoms in the vapor cell are pumped with a circularly polarized laser light along \({z}\) . The \(^{129}\) Xe atoms are polarized by spin-exchange collisions with optically pumped \(^{87}\) Rb atoms. The pump laser light is tuned to the D1 transition at 795 nm and its optical power is \(\sim \) 26 \(\textrm {mW}\) . The magnetic field is measured via optical rotation of the linearly polarized probe laser beam propagating along the \(x\)  direction.
The probe beam is blue-detuned by 110 GHz from the D2 transition at 780 nm and its power is \(\sim \) 0.8 \(\textrm {mW}\) .
The optical rotation of the probe beam after passing the vapor cell is
(see, for example, refs. [1]}, [2]}, [3]})
\(\theta =\frac{1}{4} lr_e cfn P_x^e D(v),\) 
